LS3 dry sump overfill
Thread Starter
Intermediate
Joined: May 2019
Posts: 38
Likes: 15
From: Brandon, MS
LS3 dry sump overfill
Got oil changed a few days ago local dealership. Before you say it.....I go to dealer because it's a dry sump and there's not anyone here i trust to change and this dealership is ok on prices for such.
Anyway, it appears to be overfilled by a good half quart. Oil pressures higher than before change but not too high. After driving 20 min, waiting 10 min on level ground, a solid half quart over. If checking by running in garage to just get to 175 degrees (coolant temp), 10 minutes is about 1/4 quart.
Question: is this enough with a dry sump to cause issues? Calling dealer Monday a.m. anyway but curious how serious this is or is not.
I thought about reducing myself but don't want to touch it since it's their mistake.
Anyway, it appears to be overfilled by a good half quart. Oil pressures higher than before change but not too high. After driving 20 min, waiting 10 min on level ground, a solid half quart over. If checking by running in garage to just get to 175 degrees (coolant temp), 10 minutes is about 1/4 quart.
Question: is this enough with a dry sump to cause issues? Calling dealer Monday a.m. anyway but curious how serious this is or is not.
I thought about reducing myself but don't want to touch it since it's their mistake.
Race Director
Joined: Sep 1999
Posts: 12,438
Likes: 919
From: CONCORD NC
I don't think half a quart is hurting anything and I doubt it's effecting your oil pressure. But personally I'd drain it down myself, but I also wouldn't pay a stealership for an oil change
Safety Car
Joined: May 2016
Posts: 4,669
Likes: 1,849
From: Erlanger, Kentucky
Not super serious. Would likely just get more oil going through the PCV system.
Easiest thing to do is to use a transfer pump and pump the extra oil out of the tank. Having the tank makes this any easy task and I have done this when I overfilled my GS’s oil system one time.
Can get a transfer pump at any Harbor Freight.
And I don’t trust ANY dealership to do anything right.
I changed the oil in my dry sump GS this weekend which included pulling the lines out of the dry sump oil pan to drain them. Taking my time, it took maybe and hour. And I know it was done correctly.
Easiest thing to do is to use a transfer pump and pump the extra oil out of the tank. Having the tank makes this any easy task and I have done this when I overfilled my GS’s oil system one time.
Can get a transfer pump at any Harbor Freight.
And I don’t trust ANY dealership to do anything right.
I changed the oil in my dry sump GS this weekend which included pulling the lines out of the dry sump oil pan to drain them. Taking my time, it took maybe and hour. And I know it was done correctly.
Safety Car
Joined: Sep 2007
Posts: 4,009
Likes: 491
From: South Florida
I don't think you would need to worry about 1/4 qt but I would still probably drain or siphon some out. What does the dealership charge for this job? I've been paying around $225-$250 to have a shop do mine.
Thread Starter
Intermediate
Joined: May 2019
Posts: 38
Likes: 15
From: Brandon, MS
I paid just over 200, all fees, etc. With Mobil 1. They are very competitive on routine maintenance stuff.
Melting Slicks
Joined: Oct 2022
Posts: 3,340
Likes: 1,934
From: Ulta Vista, AZ
Jesus. $200+ and still done wrong?
12 qts of Mobil 1 is $65 or so and add another $10 for a filter and know its done right.
Either way, it’s probably fine, but I’d siphon it out and do myself forward
12 qts of Mobil 1 is $65 or so and add another $10 for a filter and know its done right.
Either way, it’s probably fine, but I’d siphon it out and do myself forward
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski